# Methanesulfonic acid, ethyl ester — US federal chemical regulatory reporting thresholds by program (CERCLA, EPCRA, CAA)

For Methanesulfonic acid, ethyl ester, cas no. is 62-50-0; cercla rq (lbs) is 1; rcra waste number is U119; regulatory categories is 4, verified against its source on 2026-08-05.

- **Substance:** Methanesulfonic acid, ethyl ester _(verified: appears in the quote below)_
- **CAS No.:** 62-50-0 _(verified: appears in the quote below)_
- **CERCLA RQ (lbs):** 1 _(verified: appears in the quote below)_
- **RCRA waste number:** U119 _(verified: appears in the quote below)_
- **Regulatory categories:** 4 _(verified: appears in the quote below)_

## What the source says

> Methanesulfonic acid, ethyl ester | 62-50-0 | 4 | U119 | 1 (0.454)

## Source

- https://www.ecfr.gov/current/title-40/chapter-I/subchapter-J/part-302/section-302.4

Last verified: 2026-08-05. Review by: 2027-08-05.
Part of [US federal chemical regulatory reporting thresholds by program (CERCLA, EPCRA, CAA)](https://referencesource.org/chemical-regulatory-reporting-thresholds/).